Safety light



FIG. 1 is a front perspective view of a safety light showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right view thereof; and,

FIG. 7 is a left view thereof.

The broken lines are environmental and form no part of the claimed design. 

The ornamental design for a safety light, as shown and described. 